diff --git a/stock/doctype/item/item.js b/stock/doctype/item/item.js
index bc9d57f..f19a464 100644
--- a/stock/doctype/item/item.js
+++ b/stock/doctype/item/item.js
@@ -18,18 +18,12 @@
 	// make sensitive fields(has_serial_no, is_stock_item, valuation_method)
 	// read only if any stock ledger entry exists
 
-	if (!doc.__islocal) {
-		set_field_permlevel("item_code", 1);
-	}
+	cur_frm.toggle_enable("item_code", doc.__islocal);
 
 	if ((!doc.__islocal) && (doc.is_stock_item == 'Yes')) {
 		var callback = function(r, rt) {
-			if (r.message == 'exists') permlevel = 1;
-			else permlevel = 0;
-
-			set_field_permlevel('has_serial_no', permlevel);
-			set_field_permlevel('is_stock_item', permlevel);
-			set_field_permlevel('valuation_method', permlevel);
+			var enabled = (r.message == 'exists') ? false : true;				
+			cur_frm.toggle_enable(['has_serial_no', 'is_stock_item', 'valuation_method'], enabled);
 		}
 		$c_obj(make_doclist(doc.doctype, doc.name),'check_if_sle_exists','',callback);
 	}